Switch Skattrak 14vien pump to a oem on a superstocker?

I have a gpr1200 triple superstocker (The blue ones that was built by Riva)
Today it have a Skattrak 14vien pump, now I will sell the ski but I prefer to keep the pump and replace it with a 2000 oem pump and impeller..

What exacly will happend, will it be on the rev limiter?
Total propslip?